<template>
  <div class="app-container">
    <el-table ref="dragTable"
              v-loading="listLoading"
              :data="list"
              row-key="id"
              border
              highlight-current-row style="width: 100%">
      <el-table-column align="center" label="Id" width="100">
        <template slot-scope="{row}">
          <span>{{ row.id }}</span>
        </template>
      </el-table-column>
      <el-table-column width="120px" label="合同名称">
        <template slot-scope="{row}">
          <span>{{ row.name }}</span>
        </template>
      </el-table-column>

      <el-table-column width="120px" align="center" label="合同编号">
        <template slot-scope="{row}">
          <span>{{ row.no }}</span>
        </template>
      </el-table-column>

      <el-table-column width="120px" align="center" label="客户名称">
        <template slot-scope="{row}">
          <span>{{ row.customerName }}</span>
        </template>
      </el-table-column>


      <el-table-column width="120px" align="center" label="备注">
        <template slot-scope="{row}">
          <span>{{ row.comment }}</span>
        </template>
      </el-table-column>

      <el-table-column width="100px" label="签署人">
        <template slot-scope="{row}">
          <span>{{ row.comment }}</span>
        </template>
      </el-table-column>
      <el-table-column align="center" label="签订日期" width="180">
        <template slot-scope="{row}">
          <span>{{ row.signedDate }}</span>
        </template>
      </el-table-column>
      <el-table-column align="center" label="交付时间" width="180">
        <template slot-scope="{row}">
          <span>{{ row.deliveryDate }}</span>
        </template>
      </el-table-column>
      <el-table-column align="center" label="创建时间" width="180">
        <template slot-scope="{row}">
          <span>{{ row.creationTime }}</span>
        </template>
      </el-table-column>

      <el-table-column class-name="status-col" label="enable" width="80">
        <template slot-scope="{row}">
          <el-checkbox :checked="row.enable"></el-checkbox>
        </template>
      </el-table-column>

      <el-table-column align="center" label="操作" width="80">
        <template slot-scope="{}">
          <svg-icon class="drag-handler" icon-class="drag" />
        </template>
      </el-table-column>
    </el-table>
    <div class="show-d">
      <el-tag>The default order :</el-tag> {{ oldList }}
    </div>
    <div class="show-d">
      <el-tag>The after dragging order :</el-tag> {{ newList }}
    </div>
  </div>
</template>

<script>
  import Sortable from 'sortablejs'

  export default {
    name: 'DragTable',
    filters: {
      statusFilter(status) {
        const statusMap = {
          published: 'success',
          draft: 'info',
          deleted: 'danger'
        }
        return statusMap[status]
      }
    },
    data() {
      return {
        list: null,
        total: null,
        listLoading: true,
        listQuery: {
          page: 1,
          skipcount: 50
        },
        sortable: null,
        oldList: [],
        newList: []
      }
    },
    created() {
      this.getList()
    },
    methods: {
      async getList() {
        this.listLoading = true
        const data = await fetchList(this.listQuery)
        this.list = data.items
        this.total = data.totalCount
        this.listLoading = false
        this.oldList = this.list.map(v => v.id)
        this.newList = this.oldList.slice()
        this.$nextTick(() => {
          this.setSort()
        })
      },
      setSort() {
        const el = this.$refs.dragTable.$el.querySelectorAll('.el-table__body-wrapper > table > tbody')[0]
        this.sortable = Sortable.create(el, {
          ghostClass: 'sortable-ghost', // Class name for the drop placeholder,
          setData: function (dataTransfer) {
            // to avoid Firefox bug
            // Detail see : https://github.com/RubaXa/Sortable/issues/1012
            dataTransfer.setData('Text', '')
          },
          onEnd: evt => {
            const targetRow = this.list.splice(evt.oldIndex, 1)[0]
            this.list.splice(evt.newIndex, 0, targetRow)

            // for show the changes, you can delete in you code
            const tempIndex = this.newList.splice(evt.oldIndex, 1)[0]
            this.newList.splice(evt.newIndex, 0, tempIndex)
          }
        })
      }
    }
  }
</script>

<style>

  .sortable-ghost {
    opacity: .8;
    color: #fff !important;
    background: #42b983 !important;
  }
</style>

<style scoped>

  .icon-star {
    margin-right: 2px;
  }

  .drag-handler {
    width: 20px;
    height: 20px;
    cursor: pointer;
  }

  .show-d {
    margin-top: 15px;
  }
</style>
